Loud speaker for radios



Nov. 30 1926.

J. D. ELBERT ,LOUD SPEAKER FOR M13105 2 SheetsSheet 1 Filed May 20, 1925 NW. 39 y 192%.. 1,805,845"

J. D. ELBERT LOUD SPEAKER FOR RADIOS Filed May 20, 1925 2 Sheets-Sheet a :Z/ m 5/ E2 v I? //6 A? /g a I 11/ 1' 1 y 1 A WWW I v v 7 I HEW angles and engaged with theab utrnent 18 in the manner above described. The intermediate portion of the inner face of the right angled terminal is equipped with an enlargement 20 which serves as an armature adapted to be attracted when the magnetic coil 17 is energized, thereby undulating the diaphragm 9 in a manner well known in the art. The magnetic 0011 1S energized by electriccurlciut Wires 21. Any suitable means .iorsu porting tlie loud speaker may be employec such, for instance, as the supporting medium illustrated in Fi 1, which consists of abase 22, pedestal 23 and diverging arms 24, thetree ends of which latter embrace the inner face of the deflector 7. This means is especially adapted for supporting the device on a table or the like.

, the space between the disk 10 and the up per deflector 8. Tones of intermediate pitch would pass through the spaces both above and below the diaphragm supporting disk 10. The tones are gradually amplified as they pass from the diaphragm outwardly toward the outer periphery of the dia- On the other hand should it be desired to suspend the speaker phragm supporting disk 10 and deflectors 'i' and 8.

It is, of course, to be understood that various changes may be made in this device to adapt the same for use in different Ways but one of the preferred forms of using the invention is set forth herein to show the principle of the invention. i

What is claimed is 1. Av loud speaker including a plurality of deflectors equipped with an interengaged interposed diaphragm, and means carried by one of the deflectors and engaged with the diaphragm for undulating the latter. I

2. A sound amplifier including sound dcflectors equipped with an exposed electri cally operated diaphragm therebetwecn.

3. A sound amplifier including an electri-x cally undulated diaphragm, and sound defiectors mounted on the opposite sides of said diaphragm in relatively close proximity thereto, said deflectors diverging at a point beyond the diaphragm.

4. A sound amplifier including a pair of plates equipped with an interposed diaphraginand means for undulating the latter, said plates and d aphragm being held in fixed position and in close proximity throughout the expanse of the diaphragm, the plates diverging at a point beyond the diaphragm.

5. A loud speaker including a pair of substantially hemispherical deflectors, a dia phragm interposed between the proximate faces of the deflectors and connected thereto, and ele'ctroanagnetic means mounted in one of the deflectors and in connection with the diaphragm for undulating the latter.

JOHN D. ELBERT. 

